Glossary I - Yenra

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Health & careIAQ

Indoor air quality: the condition of air inside buildings as it relates to occupants and indoor pollutants. Its assessment considers specific pollutants, ventilation and sources rather than a single universal reading.

Reference: EPA: indoor air quality

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Historical names & systemsiDEN

Integrated Digital Enhanced Network, Motorola's cellular technology combining telephone and dispatch-style push-to-talk services. It is a historical network family; operation of surviving equipment requires a compatible active service.

Related coverage: Motorola iDEN: Push-to-Talk, Dispatch Networks, and Their Legacy

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Rocks & EarthIgneous rock

Rock formed as molten material cools and solidifies. Cooling history influences its texture: slow cooling beneath the surface often allows larger crystals, while rapid cooling can produce finer textures or glass.

Read the guide: Rocks and Minerals: A Guide to Observing and Understanding Them

Reference: National Park Service: rocks

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Transport & aerospaceIMA

Integrated Motor Assist, Honda's name for a hybrid system in which an electric motor assists the engine. The exact vehicle generation determines its mechanical arrangement and operating behavior.

Related coverage: Honda Insight concept

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NetworksIMS

IP Multimedia Subsystem: a telecommunications architecture for delivering multimedia services over IP networks. It coordinates functions such as registration and session control rather than naming a particular handset.

Related coverage: Gigabit Ethernet Test Equipment

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Business & organizationsIMTT

International-Matex Tank Terminals, a company name encountered in bulk-liquid storage and terminal coverage. Here the acronym identifies an organization rather than a heat-transfer-fluid specification.

Related coverage: Heat transfer fluid

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Home & materialsInduction heating

Producing heat in a suitable conductive object through a changing magnetic field. In an induction cooktop, the field induces electrical currents in compatible cookware, generating heat in the vessel. Check the vessel’s induction rating and the cooktop’s base-size requirements; a stainless-steel label alone leaves the magnetic base construction unspecified.

Guide: Stainless Steel Kettles: Construction, Compatibility, and Care

Reference: U.S. Department of Energy: induction cooking

Compare: Watt, Kilowatt-hour

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Security & privacyInformation security

Protecting information and systems against unauthorized access, disclosure, alteration or disruption. Confidentiality, integrity and availability describe complementary goals of that protection.

Reference: NIST: information security

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Computers & specificationsInformation system

An organized combination of people, processes, data and technology that collects, handles or communicates information. Reviewing a system includes how people use it as well as its hardware and software.

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PhotographyInkjet printing

Printing that deposits fine droplets of liquid ink through nozzles onto a medium such as paper. Photo results depend on the printer, ink, paper, color settings and maintenance. Compare supported media and the complete printing workflow alongside resolution figures; a printer’s dot specification and an image’s pixels per inch describe different things.

Guide: Photo Printers: Choose a Method and Plan the Real Cost

Reference: Canon: how inkjet printing works

Compare: Dye-sublimation printing, Borderless printing, PPI

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Audio & videoInterlaced video

Video organized into two alternating fields per frame, one containing odd-numbered image lines and the other even-numbered lines. In interlaced capture, the fields can represent different moments. Field order matters when decoding or converting motion; combining fields incorrectly can produce comb-like edges or uneven movement.

Guide: HDV Format: Identify, Capture and Edit Older HD Video

Reference: Adobe: interlaced video and field order

Compare: Progressive scan, Frame rate, Transcoding

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Audio & videoInternet radio

Radio programming delivered through an internet connection as an audio stream. Playback depends on access to the station's stream and on the receiver or app supporting the service and format.

Read the guide: Internet Radios: Choose a Receiver, Find Stations, and Set It Up

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Computers & specificationsInteroperability

The ability of systems to exchange information and use it meaningfully. Matching a file format is only part of the task; interpretation, versions and agreed conventions also matter.

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Science & measurementInterpolation

Estimating values between known data points using a stated mathematical method. Linear interpolation follows a straight line between neighboring points; other methods make different assumptions. An interpolated value is an estimate to label separately from an original observation. Estimating beyond the data's covered range is extrapolation, with different risks and assumptions.

Guide: Data Loggers: Plan a Measurement You Can Trust

Reference: SciPy: linear interpolation, splines and extrapolation

Compare: Sample rate, Aliasing (sampling), Computational reproducibility

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Computers & specificationsIOPS

Input/output operations per second: the rate at which storage read or write operations are completed or counted. Compare figures with the request size, read/write mix, access pattern, concurrency and measurement point stated. IOPS describes an operation rate; throughput describes data volume per second, and latency describes the time an operation takes.

Guide: Disk Storage Systems: Match Architecture to Workload

Reference: AWS: I/O size, IOPS, throughput and latency

Compare: Throughput, Latency

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NetworksIP

Internet Protocol: the network-layer protocol family used to address and carry packets between networks. IPv4 and IPv6 provide different address formats; delivery behavior also depends on other protocols and the path.

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Computers & specificationsIP rating

A classification under the IEC 60529 IP Code describing protection provided by an equipment enclosure against access to hazardous parts and the entry of solid objects or water. Read the exact rating with its test conditions and the product’s instructions, including required covers. Impact resistance and charging precautions need their own specifications.

Guide: Rugged Bluetooth Speakers: Water Protection, Battery Life, and Outdoor Use

Reference: IEC: enclosure protection and the IP Code

Compare: IP

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PhotographyISO (photography)

A camera setting that relates the exposure to the resulting image brightness. In a digital camera, raising ISO can make the output brighter for the same captured light; aperture and exposure time control how much light is collected. Higher ISO often accompanies shorter exposures or dimmer scenes, where noise and usable detail deserve attention.

Guide: Better Phone Photography: Override Auto Exposure on iPhone and Android

Reference: Nikon: ISO sensitivity

Compare: Aperture, Shutter speed, Exposure compensation

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Rocks & EarthIsotope

A form of an element with the same number of protons but a different number of neutrons. Some isotopes are stable and others decay radioactively; isotope measurements can inform geological history when used with a suitable method.

Read the guide: What Rocks Reveal About Earth's Interior

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